https://www.maximizemarketresearch.com/market-report/global-glass-to-metal-seals-market/78936/

Glass-to-metal seals is the sealing elements in a liquid pump. They safeguard the system from fluid and gas leaks both inside and outside. A glass-to-metal seal is usually used for high pressure, but a low-temperature glass-to-metal seal is typically used for moderate pressures like those found in home appliances and electronic parts.